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2 Sheets-Sheet 1.

(No Model.)

0. R. SQUIRB. SEWING MACHINE.

Patented July 22, 1890.

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UNITED STATES PATENT OFFICE.

CHARLES R. SQUIRE, OF BROOKLYN, NE W YORK, ASSIGNOR TO FREDERIO OONDIT,OF PROVIDENCE, RHODE ISLAND.

SEWING-MACHINE.

SPECIFICATION forming part of Letters Patent No. 432,957, dated July 22,1890.

Original application filed August 31, 1887, Serial No. 248,383.

Divided and this applioatication filed August 26, 1889.

Serial No. 322,020. (No model.)

To all whom it may concern.-

Be it known that I, CHAELEs R. SQUIRE, of the city of Brooklyn, in thecounty of Kings, in the State of New York, have invented a certain newand useful Improvement in Sewing-Machines; and I declare the followingto be a specification thereof, reference being had to the accompanyingdrawings.

Like letters indicate like parts.

Figure 1 is a front elevation, partly in vertical section, of such partsof a sewingmachine as embody my invention. Fig. 2 is a transversevertical section on the line 00 of Fig. 1. Figs. 3 and a show in frontelevation the feed and shuttle carriers at the end of their forward andbackward movements, respectively, and the link operating the same with adifferential motion. Fig. 5 is an end elevation with the bed-plate invertical section on line 3 y of Fig. 1. Fig. 6 shows a modified form ofthe feed-carrier and shuttlecarrier and their intermediate connection.Fig. 7 is a side elevation of the feedcarrier. Fig. 8 is a cross-sectionon line 2 2 of Fig. 7.

My invention relates to mechanism for giving a differential or variablemotion to the feed-carrier and shuttle-carrier of a sewing machine.

The sewing-machine to which said invention is specially adapted is thesubjectmatter of my pending application for Letters Patent, Serial No.248,383, and it has instead of a driving-belt a device consisting of aworm-wheel rigidly mounted upon the main driving-shaft and gearing witha worm mounted 011 a shaft at a right angle with said main shaft, whichworm, by means of a crank-pin at its end and an intermediate connection,moves forward and backward a link-bar, thereby giving an oscillatingmovement to a pivoted feed-carrier and a differential movement to apivoted shuttle-carrier, which is connected with said feed-carrier by apin-andslot arrangement. My said pending application fully describessaid invention; but said application is divided, and this presentapplication relates to the means forgiving a variable or differentialoscillation to said carriers in relation to each other.

My invention consists of a pivoted feedcarrier mounted on a fixedbracket beneath the bed-plate a shuttle-carrier having a shorter radiusthan that of the feed-carrier, and which is pivoted on said bracket at apoint higher up than the pivot of the feedcarrier, and loose connectingmeans between said carriers, whereby motion is imparted to theshuttle-carrier from the feed-carrier, the latter being oscillated by alink-bar from the lower extremity of the needle-arm, as hereinafterparticularly specified.

As the several parts of my improved sewing-machine illustrated in thedrawings are fully specified in my said pending applicapion, they needonly to be briefly described iere.

A represents the table, and B the legs, of the sewing-machine.

O is the bed-plate, cut away at C to allow the lower end of theneedle-bar to extend through it. It is fastened to the table A by boltsF. Thepitman M of a treadle revolves the wheel M in the well-knownmanner. The wheel M is rigidly fastened upon the main shaft M, which ismounted upon the legs B of the machine. A worm-wheel L is secured uponthe main shaft M and turns with it.

The bed-plate C has hangers C C projecting downwardly. A shaft I ismounted within a bearing 0 formed in the hanger C and at its rear endhas a central conical recess 2, into which enters a screw-bolt C, whichpasses through the haugerO and engages with said recess 2 to furnish abearing for the shaft 1 at that end, and to take up the lost motion ofsaid shaft longitudinally. The shaft I has a crank and pin I and a wormK formed upon it.

A needle-arm G is pivotally mounted at G 011 the fixed arm D, and hasits lower extremity slotted longitudinally, as shown at g. The cranlepinI enters and engages with said slot g. At its opposite end theneedle-arm G carries the vertically-reciprocating needlebar 11 in theusual manner, said bar H being supported within guides of the standardE. A bracket O extends downwardly from the bed-plate O. A feed-carrier Nis pivoted thereto at n and a shuttle-carrier O is pivoted to saidbracket at 0. The feed-carrier N has a slot 0 and the shuttle-carrier Ohas a pin 02, which enters and engages with said slot 0 A link-bar P,pivoted to the end of the needle-arm at p, is also pivoted to thefeed-carrier at p.

The operation of said parts of my sewingmachine is as follows: Therevolution of the wheel M by the pitman M of the treadle, in the usualmanner, turns the main shaft M and the worm-shaft L, which is fastenedon said main shaft. The worm-wheel L engages with and turns the worm Kof the shaft 1', and the crank-pin I, engaging with the slot 9 of theneedle-arm G, causes said needle-arm to vibrate, which vibratory motiongives a reciprocating motion to the link bar P, and at the same timegives a vertical reciprocating motion to the needle-bar H and causes theneedle inserted therein to pass into and out of the cloth. The link-barin turn oscillates the feed-carrier N, which oscillation is communicatedto the shuttle-carrier O by means of said pin-and-slot connection n 0The carriers N 0 have a differential movement, because the distance fromthe pivot n of the carrier N to the pivot p, by which the link P isconnected with said feed-carrier, is greater than the distance from thepivot 0 of the shuttle-carrier O and the pin n of said carrier, whichenters the slot 0 of the feedcarrier N. The consequence is that theshuttle-carrier O has a quicker travel and describes a greater are thanthe feed-carrier N. The feed-carrierhas two cams-one a side cam nprojecting laterally from the rear face of said carrier, and the other asegmental cam 12 formed eccentrically upon the periphery of saidfeed-carrier.

A feed-bar S, having a downwardly-proj ecting lip s, rests upon theperiphery of the feedcarrier N, and has at its end a longitudinal slot8. A hanger T extends downwardly from the bed-plate O, and has a fixedpin 25. The pin 15, entering the slot 3, supports the feed-bar S at thatend. As the carrier N moves forward, the feed-bar S is lifted by thesegmental cam W and is also advanced by the lateral pressure of the sidecam 01 of said carrier. As the carrier N moves backward, the cam ncauses the feed-bar, which rides upon it, to descend, and the passage ofthe cam n allows said feed-bar to return to its former position by theaction of thespring These movements of the feed-bar, in connection withthe presser-foot, feed the cloth from stitch to stitch.

The shuttle-carrier O has a rest 0 in which the shuttle Ris supportedand carried. WVhen the feed and shuttle carriers are thrown back in theposition shown in Fig. i, the needle is down to its full extent, andwill rise a short distance to loop the thread before the shuttle reachesthe loop in its forward movement. The shuttle-carrier advances morerapidly than the feed-carrier, and passes the shuttle through the loopand moves rapidly forward out of the way, while the feed-carrier followsat the end of their forward throw, and the needle is then up to itsfullextent. As the needle descends, the carriers rock back, the feed-baris lowered and pulled back by the spring to its normalposition, as shownin Fig. 5, and the shuttle is carried back by its carrier to the fullextent of its backward throw, so as to give ample space and time for theneedle to descend and make the next loop.

Instead of connecting the carriers by a pin upon one passing through aslot in the other, as hereinbefore described, they may be connected byalink V, and mounted, as shownin Fig. 6, and produce the same movements.In Fig. 6, however, the bracket is shown as being solid and having aslot, through which the pinn extends. In such a construction of theparts the carriers are mounted upon opposite sides of the bracket.

I claim as a novel and useful invention and desire to secure by LettersPatent 1. In a sewing-machine having a downwardly-projecting bracket,the combination of a vibrating needle-arm, a reciprocating needle-barand needle, an oscillating feedcarrier pivoted to said bracket andmovable in a plane parallel to the plane of said needlearm, anoscillating shuttlecarrier pivoted upon said bracket eccentrically tothe center of oscillation of saidfeed-carrier and in a plane parallelwith said feed-carrier, said carriers being connected together at pointsunequally distant fromtheir centers, and a link connecting saidvibrating needle-arm and feed-carrier, substantially as specified.

2. In a sewing-machine having a downwardly-projecting bracket, thecombination of a pivoted feed-carrier and a pivoted shut tle-carrier, aslot-and-pin connection of said carriers for operating them jointly with'a'dit ferential movement, a connecting-link pivoted to one of saidcarriers, a vibrating needle-arm having said link pivoted thereto, and ashaft having a crank adapted to vibrate said arm, substantially asspecified 3. In a sewing-machine provided with a downwardly-proj ectingbracket, the combination of a vibrating needle-arm, a reciprocatingneedle-bar and needle, an oscillating feed-carrier formed with a slotand pivoted to said bracket so as to be movable in a plane parallel tothe plane of said needle-arm, an oscillating shuttle-carrier pivotedupon said bracket eccentrically to the center of oscillation of saidfeed-carrier and having a pin pro- 'jecting laterally into the slot ofsaid feed-carrier, said shuttle-carrier being movable in a planeparallel to said feed-carrier, and a link connecting said feed-carrierand needle-arm, substantially as specified.

4. In a sewing-machine having a downwardly-projecting bracket, thecombination of a pivoted oscillating feed-carrier having a IIO slot, apivoted oscillating shuttle-carrier arranged eccentrically to the centerof oscillation of said feed-carrier and provided With a pin projectinglaterally into said slot, a vibrating needle-arm and needle, a linkpivoted to said feed-carrier and needle-arm, and a shaft having a crankadapted to vibrate said needle-arm, substantially as specified.

5. In a sewing-machine having a bed-plate, standard, driving mechanism,a vibrating needle-arm, a reciprocating need1e-bar,a needie, and adownwardly-projecting bracket, the combination of a link-bar receivingmotion from said driving mechanism, an oscil-

